NILO® Alloy K

1.3981

UNS K94610

A nickel-iron-cobalt controlled-expansion alloy containing 29% nickel. Its coefficient of expansion, which decreases with rising temperature to the inflection point, matches the expansion rate of borosilicate glasses and alumina ceramics. Used for glass-to-metal seals in applications requiring high reliability or resistance to thermal shock. Examples are high-power transmitting valves, transistor leads and headers, integrated-circuit lead frames, and photography flash bulbs.

Stock program

Wire

Coil

4.75 mm

Bars

Standard lengths of 2000 mm up to 6000 mm. Cut to size on request (tolerance +2/-0 mm).

4.75 mm
9.52 mm
12.70 mm
15.88 mm
19.05 mm
25.40 mm
31.75 mm
34.93 mm
38.10 mm
44.45 mm
50.80 mm
57.15 mm
63.50 mm
76.10 mm
88.90 mm

Sheets / Plates

Dimensions: widths 1000/1220/1500 mm, lengths 2000/2500/3000 mm.

Thickness:

0.10 mm
0.15 mm
0.20 mm
0.30 mm
0.38 mm
0.50 mm
0.63 mm
0.76 mm
0.90 mm
1.00 mm
1.27 mm
1.50 mm
1.83 mm
2.03 mm
2.30 mm
2.54 mm
3.18 mm
6.35 mm
7.93 mm
9.52 mm
12.70 mm
15.88 mm
19.05 mm
25.40 mm
38.10 mm

Downloads

Datasheet

Limiting
Fe¹		53.00	%
Ni¹		29.00	%
Co¹		17.00	%
Mn	max.	0.50	%
Cr	max.	0.20	%
Cu	max.	0.20	%
Mo	max.	0.20	%
Si	max.	0.20	%
Al	max.	0.10	%
Mg	max.	0.10	%
Ti	max.	0.10	%
Zr	max.	0.10	%
C	max.	0.04	%

¹ Nominal value; adjusted to meet expansion requirements.

Density
g/cm³		8.16
lb/in³		0.295

Recommended Welding Products
Electrode	Nickel 141
	INCO WELD A
	INCO WELD B
Filler Metal	Nickel 61
	INCONEL 82